package com.zcoj.config;

/**
 * @author chenbin
 * @version 1.0
 * @description: TODO
 * @date 2023/2/24 09:11
 */
import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.parser.ParserConfig;
import com.alibaba.fastjson.serializer.SerializerFeature;
import com.fasterxml.jackson.databind.JavaType;
import com.fasterxml.jackson.databind.type.TypeFactory;
import org.springframework.data.redis.serializer.RedisSerializer;
import org.springframework.data.redis.serializer.SerializationException;

import java.nio.charset.Charset;

/**
 * Redis使用FastJson序列化
 */
public class FastJsonRedisSerializer<T> implements RedisSerializer<T> {

 public static final Charset DEFAULT_CHARSET = Charset.forName("UTF-8");

 private Class<T> clazz;

 static {
  ParserConfig.getGlobalInstance().setAutoTypeSupport(true);
 }

 public FastJsonRedisSerializer(Class<T> clazz) {
  super();
  this.clazz = clazz;
 }

 @Override
 public byte[] serialize(T t) throws SerializationException {
  if (t == null) {
   return new byte[0];
  }
  return JSON.toJSONString(t, SerializerFeature.WriteClassName).getBytes(DEFAULT_CHARSET);
 }

 @Override
 public T deserialize(byte[] bytes) throws SerializationException {
  if (bytes == null || bytes.length <= 0) {
   return null;
  }
  String str = new String(bytes, DEFAULT_CHARSET);

  return JSON.parseObject(str, clazz);
 }


 protected JavaType getJavaType(Class<?> clazz) {
  return TypeFactory.defaultInstance().constructType(clazz);
 }
}

